PortKnock Downloads & RevenuePortKnock · App Store
PortKnock is #19 in Utilities Paid in Brazil and charting in 1 of 30 countries we track.
Updated 8 Nov 2026 · rankings refresh through the day
DeveloperDanny Sung
CategoryUtilities
Price0.99 EUR
Released
Rating★ 5.0 (1)
Version5.0.1
Age rating4+
First seen by us
30 Sep 2026
30 Sep 2026Installs (est.)1k+ worldwide
📈Charting in a new country✏️Description updated✏️New iPad screenshots📈Charting in a new country📦Updated to version 5.0.1📦First update in 1696 days🆕First spotted by AppInsider🆕Released on the App Store
Full timeline · 21 events in the last 12 months
- 📈PortKnock charting in a new countryPoland
- ✏️PortKnock: description updated· RU
- ✏️PortKnock: new iPad screenshots· RU
- ✏️PortKnock: new screenshots10 screenshots (was 4) · RU
- ✏️PortKnock: new icon
→ 
· RU - 📈PortKnock charting in a new countrySouth Africa
- 📈PortKnock entered the top 100Top Paid · Utilities · DE
- 📈PortKnock charting in a new countryGermany
- 📈PortKnock charting in a new countrySpain
- ✏️PortKnock: description updated· BR
- ✏️PortKnock: new iPad screenshots· BR
- ✏️PortKnock: new screenshots10 screenshots (was 4) · BR
- ✏️PortKnock: new icon → · BR
- 📦PortKnock updated to version 5.0.1PortKnock 5 is a ground-up rebuild for modern iOS. Your Knocks from PortKnock 4 can be migrated.
NEW
- Siri & Shortcuts: send any saved Knock by voice or from the Shortcuts app, hear the result, and chain success or failure into other automations.
- Post-knock actions: run one or more actions after a knock, in the order you choose.
* Launch an app or URL (SSH, Mail, web)
* Send a webhook (any HTTP method, custom headers)
* Check that a TCP port actually opened
* Test any action without sending a knock
- Better host handling: knock hosts that resolve to several IPv4 and IPv6 addresses, see the status of each address, and choose the IP version globally or per Knock.
- Optional UDP packet payloads.
- Data Management: back up your Knocks to a file and restore them on another device or after a reinstall. When importing, preview first, then Keep Both, Replace, or Import New Only. Opening a .portknock file from Files starts the import.
- Haptic feedback when knocks are sent, succeed, or fail, with a separate setting for Siri and Shortcuts.
- Redesigned interface: custom symbols and colors for each Knock, search, duplicate, reorder, hex or decimal port display, and a live packet-by-packet progress view.
- Dark mode
- DrayTek TOTP knocks: scan a QR code or type in your secret, and PortKnock appends the rotating one-time password to your knock sequence.
CHANGED
- Requires iOS 26 or later.
- Network History is no longer recorded, and your old log does not carry over.
- The in-app Password Lock has been removed. Use iOS app locking instead.
- TOTP secret keys are stored in the Keychain and are NOT included in backups or exports. After a restore you will be reminded to re-enter them.
Questions or feedback? Email [email protected]. Thank you for your patience and your support over the years!… more - ✏️PortKnock: needs a newer iOSiOS 12.0 → iOS 26.0
- 📦PortKnock: first update in 1696 days
- 📦PortKnock updated to version 5.0.0PortKnock 5 is a ground-up rebuild for modern iOS. Your Knocks from PortKnock 4 can be migrated.
NEW
- Siri & Shortcuts: send any saved Knock by voice or from the Shortcuts app, hear the result, and chain success or failure into other automations.
- Post-knock actions: run one or more actions after a knock, in the order you choose.
* Launch an app or URL (SSH, Mail, web)
* Send a webhook (any HTTP method, custom headers)
* Check that a TCP port actually opened
* Test any action without sending a knock
- Better host handling: knock hosts that resolve to several IPv4 and IPv6 addresses, see the status of each address, and choose the IP version globally or per Knock.
- Optional UDP packet payloads.
- Data Management: back up your Knocks to a file and restore them on another device or after a reinstall. When importing, preview first, then Keep Both, Replace, or Import New Only. Opening a .portknock file from Files starts the import.
- Haptic feedback when knocks are sent, succeed, or fail, with a separate setting for Siri and Shortcuts.
- Redesigned interface: custom symbols and colors for each Knock, search, duplicate, reorder, hex or decimal port display, and a live packet-by-packet progress view.
- Dark mode
- DrayTek TOTP knocks: scan a QR code or type in your secret, and PortKnock appends the rotating one-time password to your knock sequence.
CHANGED
- Requires iOS 26 or later.
- Network History is no longer recorded, and your old log does not carry over.
- The in-app Password Lock has been removed. Use iOS app locking instead.
- TOTP secret keys are stored in the Keychain and are NOT included in backups or exports. After a restore you will be reminded to re-enter them.
Questions or feedback? Email [email protected]. Thank you for your patience and your support over the years!… more - 📈PortKnock entered the top 100Top Paid · Utilities · RU
- 📈PortKnock charting in a new countryRussia
- 🆕PortKnock first spotted by AppInsider#31 in Top Paid · Utilities · Brazil
- 🆕PortKnock released on the App Store
Collected from the stores by AppInsider since we first spotted the app. Dates are when we saw each change.
Rating
5.0 ★
1 ratings
Measured
Best rank now
#19
Utilities PaidMeasured
PortKnock on the App Store
App details
App ID
358353536
Publisher
Danny Sung
On the store since
Mar 2010
16 years on the store
Minimum OS
iOS 26.0+
iPhone 11 and later
Devices
iPhone · iPad
Universal purchase
Content rating
4+
Languages
1
EN
Size
12 MB
PortKnock downloads
Worldwide, per day, and installs to date. The band is open; the exact number is free with an account.
How this is calculated
Apple publishes no download counts. App Store downloads come from chart positions and daily rating growth per country, calibrated on Google Play install counts; lifetime installs from ratings worldwide × installs per rating. Confidence is the chance the real number is within half to double ours.
Where PortKnock's downloads come from Modelled
Last 30 days: organic search, browsing the store, features and paid ads.
Active users
All platforms, worldwide. Free with an account.
Stickiness (DAU / MAU)
how many monthly users open it on a given day
Retention · share of new users still active
Day 1
Day 7
Day 30
Time spent · per daily user
Average time spent Pro
min a day
Sessions a day Pro
Time per session Pro
min
How this is calculated
Monthly users come from lifetime installs across every store, fitted on monthly active user figures companies publish; daily users = monthly × the typical daily/monthly ratio for the category. Confidence is the chance the real number is within half to double ours.
Where it ranks now
Every top chart it appears in across 30 countries.
| Country | Charts | Rank |
|---|---|---|
| Brazil | UtilitiesPaid | #19 |
| Brazil | All AppsPaid | #165 |
Apps near PortKnock on the chart
Utilities Paid, around #19.
Ratings
App Store, worldwide.
Rating
5.0 ★
1 ratings
Measured
Ratings
1
Measured
Review momentum
ⓘ How we measure thisNew ratings a week
under 1
4-week average
Lifetime rating
4.1★
recent stars not readable yet: new ratings are a tiny share of the total
Review momentum
20/100
faster than 0% of Utilities apps
Review momentum (0-100) blends how fast the app collects ratings compared with other apps in its category (60%), whether that pace is speeding up (25%) and what recent raters give it (15%; recent stars well below lifetime pull it down). Ratings counts are read daily. A jump usually means a launch, a feature, ads or a new review prompt.
About PortKnock
-- Overview --
PortKnock is a port knocker for iPhone and iPad, built for network administrators, homelabbers, and anyone who keeps services hidden behind a firewall. Save your knock sequences once, then send them with a tap, a Siri request, or a Shortcut. It also runs on Apple silicon Macs.
PortKnock is NOT a hacking tool, a port scanner, or a general network scanner. It only sends knocks to servers that you own or administer.
You *must* have a port knock daemon (such as knockd) or a compatible router running on your server for this app to be useful.
-- Features --
- Siri and Shortcuts: "PortKnock _name_" or "Knock _name_ with PortKnock"
- Unlimited Knocks, each with any number of ports
- TCP or UDP per port, with optional UDP payloads
- Post-knock actions: launch an app or URL, send a webhook, or check that a TCP port opened
- IPv4 and IPv6, including hosts with multiple addresses and per-address status
- Shows your external IP address
- Configurable interpacket delay
- Backup, restore, and move devices with import preview and conflict resolution
- Migrates Knocks from PortKnock 4
- Custom symbols and colors, search, and reorder
- Dark mode
- DrayTek TOTP knocks (scan a QR code or enter your secret)
- Has no advertising
-- Use Cases --
Secure remote access: open a firewall port for SSH, VPN, or remote desktop only when you need it.
Automation: knock, confirm the port opened, then launch your SSH client or call a webhook, all from one tap or one Siri request.
This app is ideal if you're on a WiFi network but don't have a port knocker on the available computers. If you're sitting behind a NAT, your iPhone will have the same IP as any of the other computers on your network.
-- Brief Description of Port Knocking for the Layman --
Port Knocking is a technique to secure services behind a firewall until a specific knock sequence is given. This is not to be confused with port scanning (a network management tool for discovering open services on a system).
Imagine you left your kids at home alone. You don't want them to open the door for strangers. And when a stranger comes knocking, you don't even want them to come to the door, because you don't want them to know your kids are there. But, when you or other family members come, you might want them to open the door for you. So you teach them to listen for a certain rat-a-tat-tat or special knock that only you and your family know.
This is the same concept you can apply to your servers. If you run a knock daemon on your server, this app then lets you send the special knock to it.
Port knocking adds a layer of obscurity but does not replace strong authentication, so use it alongside SSH keys, strong passwords, and your firewall.
More on Wikipedia: http://en.wikipedia.org/wiki/Port_knocking
-- Additional Info --
If you're in need of a knock server, I personally use Judd Vinet's knock daemon for linux. It's quite easy to use: http://www.zeroflux.org/projects/knock
-- Notes --
- Requi
PortKnock is a port knocker for iPhone and iPad, built for network administrators, homelabbers, and anyone who keeps services hidden behind a firewall. Save your knock sequences once, then send them with a tap, a Siri request, or a Shortcut. It also runs on Apple silicon Macs.
PortKnock is NOT a hacking tool, a port scanner, or a general network scanner. It only sends knocks to servers that you own or administer.
You *must* have a port knock daemon (such as knockd) or a compatible router running on your server for this app to be useful.
-- Features --
- Siri and Shortcuts: "PortKnock _name_" or "Knock _name_ with PortKnock"
- Unlimited Knocks, each with any number of ports
- TCP or UDP per port, with optional UDP payloads
- Post-knock actions: launch an app or URL, send a webhook, or check that a TCP port opened
- IPv4 and IPv6, including hosts with multiple addresses and per-address status
- Shows your external IP address
- Configurable interpacket delay
- Backup, restore, and move devices with import preview and conflict resolution
- Migrates Knocks from PortKnock 4
- Custom symbols and colors, search, and reorder
- Dark mode
- DrayTek TOTP knocks (scan a QR code or enter your secret)
- Has no advertising
-- Use Cases --
Secure remote access: open a firewall port for SSH, VPN, or remote desktop only when you need it.
Automation: knock, confirm the port opened, then launch your SSH client or call a webhook, all from one tap or one Siri request.
This app is ideal if you're on a WiFi network but don't have a port knocker on the available computers. If you're sitting behind a NAT, your iPhone will have the same IP as any of the other computers on your network.
-- Brief Description of Port Knocking for the Layman --
Port Knocking is a technique to secure services behind a firewall until a specific knock sequence is given. This is not to be confused with port scanning (a network management tool for discovering open services on a system).
Imagine you left your kids at home alone. You don't want them to open the door for strangers. And when a stranger comes knocking, you don't even want them to come to the door, because you don't want them to know your kids are there. But, when you or other family members come, you might want them to open the door for you. So you teach them to listen for a certain rat-a-tat-tat or special knock that only you and your family know.
This is the same concept you can apply to your servers. If you run a knock daemon on your server, this app then lets you send the special knock to it.
Port knocking adds a layer of obscurity but does not replace strong authentication, so use it alongside SSH keys, strong passwords, and your firewall.
More on Wikipedia: http://en.wikipedia.org/wiki/Port_knocking
-- Additional Info --
If you're in need of a knock server, I personally use Judd Vinet's knock daemon for linux. It's quite easy to use: http://www.zeroflux.org/projects/knock
-- Notes --
- Requi
Latest updates
5.0.1
PortKnock 5 is a ground-up rebuild for modern iOS. Your Knocks from PortKnock 4 can be migrated.
NEW
- Siri & Shortcuts: send any saved Knock by voice or from the Shortcuts app, hear the result, and chain success or failure into other automations.
- Post-knock actions: run one or more actions after a knock, in the order you choose.
* Launch an app or URL (SSH, Mail, web)
* Send a webhook (any HTTP method, custom headers)
* Check that a TCP port actually opened
* Test any action without sending a knock
- Better host handling: knock hosts that resolve to several IPv4 and IPv6 addresses, see the status of each address, and choose the IP version globally or per Knock.
- Optional UDP packet payloads.
- Data Management: back up your Knocks to a file and restore them on another device or after a reinstall. When importing, preview first, then Keep Both, Replace, or Import New Only. Opening a .portknock file from Files starts the import.
- Haptic feedback when knocks are sent, succeed, or fail, with a separate setting for Siri and Shortcuts.
- Redesigned interface: custom symbols and colors for each Knock, search, duplicate, reorder, hex or decimal port display, and a live packet-by-packet progress view.
- Dark mode
- DrayTek TOTP knocks: scan a QR code or type in your secret, and PortKnock appends the rotating one-time password to your knock sequence.
CHANGED
- Requires iOS 26 or later.
- Network History is no longer recorded, and your old log does not carry over.
- The in-app Password Lock has been removed. Use iOS app locking instead.
- TOTP secret keys are stored in the Keychain and are NOT included in backups or exports. After a restore you will be reminded to re-enter them.
Questions or feedback? Email [email protected]. Thank you for your patience and your support over the years!
5.0.0
PortKnock 5 is a ground-up rebuild for modern iOS. Your Knocks from PortKnock 4 can be migrated.
NEW
- Siri & Shortcuts: send any saved Knock by voice or from the Shortcuts app, hear the result, and chain success or failure into other automations.
- Post-knock actions: run one or more actions after a knock, in the order you choose.
* Launch an app or URL (SSH, Mail, web)
* Send a webhook (any HTTP method, custom headers)
* Check that a TCP port actually opened
* Test any action without sending a knock
- Better host handling: knock hosts that resolve to several IPv4 and IPv6 addresses, see the status of each address, and choose the IP version globally or per Knock.
- Optional UDP packet payloads.
- Data Management: back up your Knocks to a file and restore them on another device or after a reinstall. When importing, preview first, then Keep Both, Replace, or Import New Only. Opening a .portknock file from Files starts the import.
- Haptic feedback when knocks are sent, succeed, or fail, with a separate setting for Siri and Shortcuts.
- Redesigned interface: custom symbols and colors for each Knock, search, duplicate, reorder, hex or decimal port display, and a live packet-by-packet progress view.
- Dark mode
- DrayTek TOTP knocks: scan a QR code or type in your secret, and PortKnock appends the rotating one-time password to your knock sequence.
CHANGED
- Requires iOS 26 or later.
- Network History is no longer recorded, and your old log does not carry over.
- The in-app Password Lock has been removed. Use iOS app locking instead.
- TOTP secret keys are stored in the Keychain and are NOT included in backups or exports. After a restore you will be reminded to re-enter them.
Questions or feedback? Email [email protected]. Thank you for your patience and your support over the years!
4.18
Various bug fixes. LaunchApp should now work correctly. Fixes some import bugs. Rearranged knock editing screen for clarity.
Store changes
What PortKnock changed on its store page: name, icon, screenshots, price, size, languages, requirements.
Description updated 
New iPad screenshots
New screenshots
10 screenshots (was 4)
